<!DOCTYPE html>
<html>
	<head>
		<meta charset="UTF-8">
		<title></title>
		<style type="text/css">
			.big{
				width: 400px;
				height: 400px;
				background: lightgray;
				position: relative;
				left: 200px;
				top: 200px;
			}
			.box1{
				width: 100px;
				height: 100px;
				background: #00CCFF;
				position: absolute;
				left: 50px;
				top: 50px;
				
				border: 2px solid;
			}
			.box2{
				width: 100px;
				height: 100px;
				background: #00CCFF;
				position: absolute;
				left: 100px;
				top: 100px;
				
				border: 2px solid;
				
			}
			.box3{
				width: 100px;
				height: 100px;
				background: #FFFF66;
				position: absolute;
				left: 50%;
				top: 50%;
				margin-left: -50px;
				margin-top: -50px;
				
				border: 2px solid;
				
			}
			.box4{
				width: 100px;
				height: 100px;
				background: #00CCFF;
				position: absolute;
				left: 200px;
				top: 200px;
				
				border: 2px solid;
				
			}
			.box5{
				width: 100px;
				height: 100px;
				background: #00CCFF;
				position: absolute;
				left: 250px;
				top: 250px;
				
				border: 2px solid;
				
			}
			
			
		</style>
	</head>
	<body>
		<div class="big">
			<div class="box1"></div>
			<div class="box2"></div>
			<div class="box3"></div>
			<div class="box4"></div>
			<div class="box5"></div>
			
		</div>
	</body>
</html>
